physics

KRI Usman Harun

KRI Usman Harun is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand KRI Usman Harun rather than just read about it. In short: KRI Usman Harun (359) is a Bung Tomo-class corvette in service with the Indonesian Navy. She was originally built for the Royal Brunei Navy and launched as KDB Bendahara Sakam in 2001.

Key takeaways

KRI Usman Harun belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect KRI Usman Harun to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of KRI Usman Harun from memory before moving on to harder problems.

Reference excerpt

KRI Usman Harun (359) is a Bung Tomo-class corvette in service with the Indonesian Navy. She was originally built for the Royal Brunei Navy and launched as KDB Bendahara Sakam in 2001. Usman Harun is the third ship of the Bung Tomo class.

Class background

The Bung Tomo-class corvettes are three vessels built by BAE Systems Marine (now BAE Systems Maritime – Naval Ships). The contract was awarded to GEC-Marconi in 1995 and the ships, a variant of the F2000 design, were launched in January 2001, June 2001 and June 2002 at the then BAE Systems Marine yard at Scotstoun, Glasgow. The customer refused to accept the vessels and the contract dispute became the subject of arbitration. When the dispute was settled in favour of BAE Systems, the vessels were handed over to Royal Brunei Technical Services in June 2007. In 2007, Brunei contracted the German Lürssen shipyard to find a new customer for the three ships. In 2013, Indonesia bought the vessels for £380 million or around half of the original unit cost. The ships were originally armed with MBDA Exocet Block II anti-ship missiles and MBDA Seawolf air-defence missiles. The main gun is an OTO Melara 76 mm; the ship also carries two torpedo tubes, two 30 mm remote weapon stations and has a landing spot for a helicopter. As of 2018, the MBDA Seawolf missile was out of service there was plans to replace it with the VL Mica.

Construction and career The ship was launched as KDB Bendahara Sakam on 23 June 2001, but never commissioned into the Royal Brunei Navy. Her original namesake is the Bruneian folk hero Bendahara Sakam, who took part in the Castilian War in the mid- to late 16th century. She was subsequently sold and commissioned into the Indonesian Navy as KRI Usman Harun on 18 July 2014. Her hull number 29 was changed to 359. The Singapore government protested against the naming of the ship, as its namesakes Usman Haji Muhammad Ali and Harun Said had committed the 1965 MacDonald House bombing during the Indonesia-Malaysia confrontation, resulting in three deaths and thirty-three casualties. As they wore civilian clothes and targeted civilians, they were tried for murder and executed. The ship was subsequently banned from entering Singapore ports and sea bases, with the Singapore Armed Forces declining to partake in exercises involving the ship.

Deployments In early January 2015, KRI Usman Harun was deployed to search for Indonesia AirAsia flight 8501's black boxes as the ship is equipped with the Thales Underwater Systems TMS 4130C1 hull-mounted sonar. On 11 January 2020, KRI Usman Harun was shadowed by China Coast Guard ships 5202 and 5203 off the Natuna Regency. On 10 March 2020, PT Len Industri (Persero) and Thales Nederland signed a contract for the Mid-Life Upgrade (MLU) of KRI Usman Harun. The upgrade aimed to modernize the ship's combat management, surveillance, communications, and navigation systems. The modernization programme was originally expected to be completed by the end of 2023. However, as of November 2025, the vessel remained under modernization and had not yet rejoined the fleet.

References

Illustrations

Worked examples

Example 1 — a first encounter with KRI Usman Harun

Start with the simplest possible case. Write down what KRI Usman Harun claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to KRI Usman Harun before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about KRI Usman Harun ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of KRI Usman Harun

In research: KRI Usman Harun appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses KRI Usman Harun in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: KRI Usman Harun is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1st Fleet Escort Force, 2001 ships, Bung Tomo-class corvettes, so understanding it makes those chapters shorter.
In everyday life: Look for KRI Usman Harun outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study KRI Usman Harun in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what KRI Usman Harun means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain KRI Usman Harun out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is KRI Usman Harun in simple terms?

KRI Usman Harun (359) is a Bung Tomo-class corvette in service with the Indonesian Navy. She was originally built for the Royal Brunei Navy and launched as KDB Bendahara Sakam in 2001.

Why does KRI Usman Harun matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study KRI Usman Harun?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on KRI Usman Harun.